J.I. Packer
Knowing facts about God's character, wrath, grace, and fatherly care differs from knowing him as believers meditate on his revelation, pray, praise, and obey.
Merely accumulating theological facts is insufficient without cultivating a personal and obedient relationship with God.
Rejecting both physical idols and self-made mental images is necessary if believers are to know God as he has revealed himself.
God's unchanging character, wisdom, and righteous wrath make his grace meaningful rather than sentimental.